I don’t know about “classic”, but here is a link to some ‘vintage’ sweet potato pie recipes:
http://www.vintagerecipes.net/recipes/desserts/pies/sweet_potato_pies/
‘Classic’ Southern made-from-scratch sweet potato pie:
http://www.tasteofsouthern.com/sweet-potato-pie/
Creamed Pearl Onions (gets great reviews)
https://www.tasteofhome.com/recipes/creamed-pearl-onions
Corn custard (made in ramekins - not sure how it would do in a larger dish)
http://allrecipes.com/recipe/235359/chef-johns-creamy-corn-custard/
I know you didn’t want ‘corn pudding’, but this stuff is the best ever - more popular than my grandmother’s corn pudding .... super easy, too.
http://www.cooks.com/recipe/5s9s40yj/corn-pudding.html
Thank you for the sweet potato pie recipes. I was just going to make a pumpkin pie and substitute sweet potato instead. I really dont like pumpkin anymore